Programming manual.
CNC 8070
4.
WORK PLANES.
About work planes on lathe and mill models.
·74·
(REF: 1709)
4.1 About work planes on lathe and mill models.
The operation of the work planes depends on the geometric configuration of the axes. At
a mill model, the geometric configuration of the axes is always of the "trihedron" type whereas
at a lathe model, the geometric configuration of the axes may be either a "trihedron" type
or a "plane" type (parameter GEOCONFIG).
Configuration of "Trihedron" type axes (lathe or mill model).
This configuration has three axes forming a trihedron Cartesian XYZ type . There may be
more axes, besides those forming the trihedron; that may be part of the thihedron or be
auxiliary axes, rotary axes, etc.
The order of the axes in the channel sets the main work planes, those selected with functions
G17, G18 and G19. Function G20 may be used to form any work plane with the first three
axes of the channel. The work plane by default is set by the manufacturer (parameter
IPLANE), the usual plane being G17 at a mill model and G18 at a lathe model.
The CNC displays the ·G· functions associated with the work planes.
Configuration of "plane" type axes (lathe model).
This configuration has two axes forming the usual work plane on a lathe. There may be more
axes, but they cannot be part of the trihedron; there must be auxiliary, rotary, etc.
With this configuration, the work plane is always G18 and will be formed by the first two axes
defined in the channel, the second axis as abscissa and the first axis as ordinate. The ·G·
functions associated with the work planes have the following effects.
The CNC does not display the ·G· functions associated with the work planes because it is
always the same plane.
Configuration of "plane" type axes. Configuration of "Trihedron" type axes.
Function. Meaning.
G17 It does not change planes and shows a warning about it.
G18 It has no effect (except when function G20 is active).
G19 It does not change planes and shows a warning about it.
G20 It is permitted if it does not change the main plane; i.e. it can only be used to change
the longitudinal axis.
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